FilingsForm 4

Cerebras Systems' Sean Lie sold 726,540 shares for $151.05 million on Aug 20 and Aug 21, 2026

From the public record1 min read

Published Oct 27, 2026 · 21:48 UTCUpdated Oct 27, 2026 · 22:51 UTCFiled Aug 21, 2026

Value$151.05 million

Shares726,540

Average price$207.90

FiledAug 21

Written by Claude Sonnet 5.5, an AI model, from public records. Each figure in it was checked automatically against the source's text or our database before it was published.

Sean Lie, an officer (Chief Technology Officer) of Cerebras Systems, sold 726,540 shares for $151.05 million on Aug 20 and Aug 21, 2026, at an average of $207.90 a share. A Form 4, the form an insider files when trading the company's shares, also lists exercises of stock options and conversions of Class B shares into Class A shares on Aug 20 and Aug 21, and states 368,926 Class A shares held directly after the last sale line. The form lists a gift of 213,074 shares on Aug 20, which a footnote says went to a donor-advised fund. A footnote on the Form 4, filed Aug 21, 2026 and available on the SEC's EDGAR site, says the sales were made under a Rule 10b5-1 trading plan adopted May 20, 2026.1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

How each figure was checked22 facts

Cerebras Systems Form 4 0001628280-26-058506: ownerLie SeanOur database
Cerebras Systems Form 4 0001628280-26-058506: relationshipofficer (Chief Technology Officer)Our database
Cerebras Systems Form 4 0001628280-26-058506: shares726,540Our database
Cerebras Systems Form 4 0001628280-26-058506: value$151.05 millionOur database
Cerebras Systems Form 4 0001628280-26-058506: first dateAug 20, 2026Our database
Cerebras Systems Form 4 0001628280-26-058506: last dateAug 21, 2026Our database
Cerebras Systems Form 4 0001628280-26-058506: average price$207.9Our database
Cerebras Systems Form 4 0001628280-26-058506: sidesaleOur database
Cerebras Systems Form 4 0001628280-26-058506, derivative line 1derivative line, exercise of a derivative security (code M): 308,236 shares disposed on Aug 20, 2026 at $0 per share; held directly; 41,764 owned after the lineOur database
Cerebras Systems Form 4 0001628280-26-058506, derivative line 8derivative line, exercise of a derivative security (code M): 16,293 shares disposed on Aug 21, 2026 at $0 per share; held directly; 335,162 owned after the lineOur database
Cerebras Systems Form 4 0001628280-26-058506, line 1conversion of a derivative security (code C): 696798 shares acquired on 2026-08-20, no price stated; held directly; 1292247 owned after the lineOur database
Cerebras Systems Form 4 0001628280-26-058506, line 13conversion of a derivative security (code C): 16,293 shares acquired on Aug 21, 2026 at $0 per share; held directly; 385,219 owned after the lineOur database
Footnote F1 of the Form 4 filed Aug 21, 2026 (it is attached to that document's line N1, D6, D7, D9, D10)convertible into an equal number of Class A Common StockFootnotes of the Form 4 (SEC EDGAR) ↗
Cerebras Systems Form 4 0001628280-26-058506: shares afterafter the last sale line the form states 368926 shares of Class A Common Stock held directlyOur database
Cerebras Systems Form 4 0001628280-26-058506, derivative line 1: the shares owned after the line41,764 shares of Stock Option owned after this line, held directlyOur database
Cerebras Systems Form 4 0001628280-26-058506, derivative line 8: the shares owned after the line335,162 shares of Stock Option owned after this line, held directlyOur database
Cerebras Systems Form 4 0001628280-26-058506, derivative line 7: the shares owned after the line7,582,992 shares of Class B Common Stock owned after this line, held directlyOur database
Cerebras Systems Form 4 0001628280-26-058506, derivative line 10: the shares owned after the line7,582,992 shares of Class B Common Stock owned after this line, held directlyOur database
Cerebras Systems Form 4 0001628280-26-058506, line 2gift (code G): 213,074 shares disposed on Aug 20, 2026 at $0 per share; held directly; 1,079,173 owned after the lineOur database
Footnote F2 of the Form 4 filed Aug 21, 2026 (it is attached to that document's line N2)213,074; (3)Footnotes of the Form 4 (SEC EDGAR) ↗
Cerebras Systems Form 4 0001628280-26-058506: filed onAug 21, 2026Our database
Footnote F3 of the Form 4 filed Aug 21, 2026 (it is attached to that document's line N3, N4, N5, N6, N7, N8, N9, N10, N11, N12, N14)May 20, 2026Footnotes of the Form 4 (SEC EDGAR) ↗

The record

Issuer: Cerebras Systems (CIK 2021728, filed as Cerebras Systems Inc.)
Form: 4
Accession: 0001628280-26-058506
Filed: Aug 21, 2026
Period of report: Aug 20, 2026
Reporting owner: Sean Lie (CIK 2132472, filed as Lie Sean)
Relationship: officer (Chief Technology Officer)
Rule 10b5-1 checkbox: Not ticked
Line 1: C (conversion of a derivative security) · 696,798 Class A Common Stock · Aug 20, 2026 · acquired, directly · 1,292,247 held after · footnote F1
Line 2: G (gift) · 213,074 Class A Common Stock at $0.00 · Aug 20, 2026 · disposed, directly · 1,079,173 held after · footnote F2
Line 3: S (sale) · 11,706 Class A Common Stock at $203.78 · Aug 20, 2026 · disposed, directly · 1,067,467 held after · footnotes F3 and F4
Line 4: S (sale) · 47,766 Class A Common Stock at $204.87 · Aug 20, 2026 · disposed, directly · 1,019,701 held after · footnotes F3 and F5
Line 5: S (sale) · 133,383 Class A Common Stock at $205.67 · Aug 20, 2026 · disposed, directly · 886,318 held after · footnotes F3 and F6
Line 6: S (sale) · 93,017 Class A Common Stock at $206.67 · Aug 20, 2026 · disposed, directly · 793,301 held after · footnotes F3 and F7
Line 7: S (sale) · 108,507 Class A Common Stock at $207.68 · Aug 20, 2026 · disposed, directly · 684,794 held after · footnotes F3 and F8
Line 8: S (sale) · 119,311 Class A Common Stock at $208.69 · Aug 20, 2026 · disposed, directly · 565,483 held after · footnotes F3 and F9
Line 9: S (sale) · 114,976 Class A Common Stock at $209.86 · Aug 20, 2026 · disposed, directly · 450,507 held after · footnotes F3 and F10
Line 10: S (sale) · 46,214 Class A Common Stock at $210.56 · Aug 20, 2026 · disposed, directly · 404,293 held after · footnotes F3 and F11
Line 11: S (sale) · 10,715 Class A Common Stock at $211.42 · Aug 20, 2026 · disposed, directly · 393,578 held after · footnotes F3 and F12
Line 12: S (sale) · 24,652 Class A Common Stock at $212.64 · Aug 20, 2026 · disposed, directly · 368,926 held after · footnotes F3 and F13
Line 13: C (conversion of a derivative security) · 16,293 Class A Common Stock at $0.00 · Aug 21, 2026 · acquired, directly · 385,219 held after
Line 14: S (sale) · 16,293 Class A Common Stock at $210.01 · Aug 21, 2026 · disposed, directly · 368,926 held after · footnotes F3 and F14
Derivative line 1: M (exercise of a derivative security) · 308,236 Stock Option at $0.00 · Aug 20, 2026 · disposed, directly · 41,764 held after · footnote F15
Derivative line 2: M (exercise of a derivative security) · 138,236 Stock Option at $0.00 · Aug 20, 2026 · disposed, directly · 36,764 held after · footnote F15
Derivative line 3: M (exercise of a derivative security) · 87,326 Stock Option at $0.00 · Aug 20, 2026 · disposed, directly · 12,674 held after · footnote F15
Derivative line 4: M (exercise of a derivative security) · 114,455 Stock Option at $0.00 · Aug 20, 2026 · disposed, directly · 35,545 held after · footnote F16
Derivative line 5: M (exercise of a derivative security) · 48,545 Stock Option at $0.00 · Aug 20, 2026 · disposed, directly · 351,455 held after · footnote F17
Derivative line 6: M (exercise of a derivative security) · 696,798 Class B Common Stock at $0.00 · Aug 20, 2026 · acquired, directly · 8,279,790 held after · footnote F1
Derivative line 7: C (conversion of a derivative security) · 696,798 Class B Common Stock at $0.00 · Aug 20, 2026 · disposed, directly · 7,582,992 held after · footnote F1
Derivative line 8: M (exercise of a derivative security) · 16,293 Stock Option at $0.00 · Aug 21, 2026 · disposed, directly · 335,162 held after · footnote F17
Derivative line 9: M (exercise of a derivative security) · 16,293 Class B Common Stock at $0.00 · Aug 21, 2026 · acquired, directly · 7,599,285 held after · footnote F1
Derivative line 10: C (conversion of a derivative security) · 16,293 Class B Common Stock at $0.00 · Aug 21, 2026 · disposed, directly · 7,582,992 held after · footnote F1
Footnote F1: The Class B Common Stock is convertible into an equal number of Class A Common Stock at any time, at the Reporting Person's election, and has no expiration date.
Footnote F2: The reporting person transferred 213,074 shares of the Issuer's common stock to a donor-advised fund sponsored by a charitable organization under Section 501(c)(3) of the Internal Revenue Code.
Footnote F3: The sale reported on this Form 4 represents shares sold by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 20, 2026.
Footnote F4: The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $203.18 to $204.17, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
Footnote F5: The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $204.18 to $205.17, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
Footnote F6: The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $205.18 to $206.17, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
Footnote F7: The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $206.18 to $207.17, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
Footnote F8: The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $207.18 to $208.17, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
Footnote F9: The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $208.18 to $209.17, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
Footnote F10: The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $209.18 to $210.17, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
Footnote F11: The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $210.18 to $211.17, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
Footnote F12: The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $211.21 to $212.12, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
Footnote F13: The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $212.22 to $213.16, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
Footnote F14: The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $210.00 to $210.16, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
Footnote F15: The stock option is fully vested and exercisable.
Footnote F16: The stock option vests in 48 substantially equal monthly installments beginning on February 1, 2023.
Footnote F17: The stock option vests in 48 substantially equal monthly installments beginning on February 1, 2024.